ナトリウム冷却高速炉の炉心崩壊事故における溶融炉心物質の流出挙動に関する研究; 内部構造を有したナトリウム流路を通じた流出挙動の検討

Study on discharge behavior of molten core materials in core on core disruptive accidents of sodium cooled fast reactors; Consideration on discharge behavior through a sodium-filled channel with an internal structure

加藤 慎也  ; 松場 賢一  ; 神山 健司  ; Mikisha, A.*; Akayev, A.*; Vurim, A.*; Baklanov, V.*

Kato, Shinya; Matsuba, Kenichi; Kamiyama, Kenji; Mikisha, A.*; Akayev, A.*; Vurim, A.*; Baklanov, V.*

ナトリウム冷却高速炉の炉心崩壊事故時に想定されるナトリウム流路を通じた溶融炉心物質の流出挙動に関わる知見を拡充するため、溶融炉心物質の模擬物質として溶融アルミナを用い、縮流部を有するナトリウム流路へ浸入させる試験を実施した。本報では、試験結果を基に流路内部構造が流出挙動に与える影響を考察し報告する。

In order to enrich experimental knowledge of discharge behavior of molten core materials through a sodium-filled channel in core disruptive accidents of sodium cooled fast reactors, an out-of-pile experiment was conducted, in which molten alumina was used as a molten-fuel simulant and it penetrated into a sodium-filled channel with an internal structure reducing a flow area. In this presentation, consideration on effects of the internal structure on melt discharge-behavior will be presented based on experimental results.